Please go to Settings on your Android phone (not in the App) -> Connection -> WiFi -> Press on the active WiFi connection and hold until a pop-up menu appears, we need to click on "Manage network settings"
Look for Advanced Settings or IP Settings

Please select Static IP and you should see DNS settings then.

Please put 1.1.1.1 on DNS 1 and 8.8.8.8 on DNS 2.

Then save settings and try browsing again, it should now work.